This will not only use the parklands and make them populated for safety, but also bring people out doors during their lunch break, and to go somewhere with food and interesting other stuff. For example, central park in New York, and many asian cities have them. Promote these areas as new business places for the local entrepreneurs in adelaide, and most importantly the Adelaide Hills.
Lets give Adelaide people another place away from the small streets, cars and noise in the city, and have place with less polluted air. Where cultures can share their values and food. A place for the people, not big companies.